This 1 OAS Mistake Could Ruin Your Retirement Plans Abroad

There’s a little-known rule buried inside OAS that can catch people completely off guard.

You might assume you’re going to receive hundreds of dollars a month in retirement, only to find out you may not be entitled to any of it.

Many Canadians have never heard of this rule, and it’s not the OAS clawback rule if that’s what you’re thinking.

So let me show you how it works.

The 10-Year Rule

The first number to understand with OAS is 10 years.

If you’re living in Canada when your OAS pension is approved, you generally need to be at least 65, be a Canadian citizen or legal resident, and have lived in Canada for at least 10 years after age 18.

The important part here is that OAS is based primarily on residence in Canada. It is not something you earn by making contributions over your working life. You can potentially qualify even if you spent very little time working in Canada.

And those 10 years do not have to start when you become a citizen. What matters is whether you were residing in Canada and met the applicable legal-status requirements.

So this rule is especially important for immigrants who came to Canada later in life. Someone who arrived at 30 may barely think about it. Someone who arrived at 55 could be counting every year.

For example, say someone moves to Canada at 55 and lives here continuously until age 65. They now have 10 years of Canadian residence after age 18, so they may meet the minimum residence requirement to qualify for OAS while living in Canada.

But that last part matters: while living in Canada.

Because once you decide to retire somewhere else, the rule changes.

And there is an important exception that can sometimes help people who don’t have the full 10 years. I’ll come back to that later when we get into Canada’s social security agreements.

The Big OAS Mistake: The 20-Year Rule

And this brings us to probably the most important number in this video: 20 years.

There’s a lot of confusion around this because many people hear the 10-year rule and assume that once they’ve lived in Canada for 10 years, they qualify for OAS no matter where they live.

But that’s not quite how it works.

Qualifying for OAS while you live in Canada does not automatically mean you can keep collecting it if you move overseas.

If you’re living outside Canada, the rule is that you need at least 20 years of Canadian residence after age 18 to receive OAS abroad.

But there is an important exception here too. In some cases, a social security agreement with another country can help you meet this requirement. I’ll show you exactly how that works later in the blog post.

But first, imagine two people who both qualify for OAS while living in Canada.

One has lived here for 19 years.

The other has lived here for 20 years.

If they both decide to retire permanently overseas, that one extra year can make a huge difference. The person with 20 years can generally continue receiving OAS abroad. The person with 19 years may not.

And this is where the mistake can really hurt.

Say you have 15 years of Canadian residence. You qualify for OAS while living in Canada, start collecting it, and build your retirement budget around that monthly payment.

Then you move abroad assuming the cheque simply follows you.

If you don’t meet the rules for receiving OAS outside Canada, you can receive it abroad for only up to six months. After that, your OAS payments can stop while you remain outside Canada.

You haven’t necessarily lost OAS forever. If you return to live in Canada, you can contact Service Canada to have your payments restarted.

But the big mistake is assuming that qualifying for OAS in Canada means you qualify to receive it anywhere in the world.

Those are two different tests.

If you’re trying to figure out how rules like this affect your move, my Blueprint Abroad course walks you through the Canadian side step by step, including residency, government benefits, taxes, and your accounts.

And if you want help applying those rules to your own situation, you can book one-on-one Canada exit planning with our team.

The 40-Year Rule: How Much OAS Do You Actually Get?

So now we get to the third number: 40 years.

As of July to September 2026, the maximum regular OAS pension is $751.97 per month for someone age 65 to 74, and $827.17 per month for someone 75 or older.

To receive the full residence-based pension, you generally need 40 years of Canadian residence after age 18. If you have fewer than 40 years, your pension is generally prorated at 1/40th of the full amount for each year of Canadian residence.

Using the current maximum for someone age 65 to 74:

So the difference can be pretty significant.

Someone with 20 years of Canadian residence would be looking at roughly $376 a month at current rates, compared with about $752 a month for someone entitled to the full amount.

That’s almost $4,500 a year less.

And that’s the main thing to understand about the 40-year rule: qualifying for OAS and receiving the maximum OAS are two very different things. Your years of Canadian residence directly affect how much of that maximum you’re entitled to.

The Big Exception: Social Security Agreements

Now, there is an important exception to both the 10-year and 20-year rules.

Canada has social security agreements with more than 50 countries, including countries like the United States, Australia, Austria, Portugal, the Philippines, Japan and South Korea.

Depending on the specific agreement, time you lived or worked in another country can sometimes be combined with your Canadian residence to help you meet the minimum OAS qualification requirements.

For example, the government gives the example of someone who lived in Canada for only 8 years, but also had qualifying time in Portugal. Under the Canada-Portugal agreement, that Portuguese time can help them reach the 10-year minimum and qualify for OAS.

But here’s the really important part:

Those foreign years can help you qualify. They don’t necessarily increase the amount Canada pays you.

In that example, the person still receives only 8/40ths of the full OAS pension, because they actually lived in Canada for eight years.

And the same idea can apply to the 20-year rule for receiving OAS abroad.

Canada gives another example of a 65-year-old named Thomas who lived in Canada for 16 years before moving back to Austria. Normally, 16 years wouldn’t be enough to keep receiving OAS outside Canada. But because of the Canada-Austria social security agreement, his Austrian residence can be counted to help him meet the 20-year eligibility requirement.

He can therefore receive OAS while living in Austria.

But his Canadian pension is still based on his actual Canadian residence:

16 years in Canada = 16/40ths of the full OAS pension.

So this is the distinction to remember:

QUALIFICATION YEARS ≠ PAYMENT YEARS

A social security agreement might get you over the line to qualify, including the 20-year threshold for receiving OAS abroad, without increasing the size of your Canadian OAS cheque.

And because every agreement is different, don’t assume that simply moving to another country solves the problem. You need to check the specific agreement that applies to that country.

What Counts as Canadian Residence for OAS?

One important wrinkle is that OAS residence is not automatically the same thing as tax residence.

Under the Old Age Security Regulations, you’re considered resident in Canada if you make your home and ordinarily live here. So filing Canadian tax returns, paying Canadian tax, owning a Canadian business or keeping Canadian bank accounts can all help show ties to Canada, but none of those automatically make a year count for OAS.

When you apply, Service Canada asks for information about where you’ve lived since age 18, and the regulations allow them to require details of your periods of Canadian residence and relevant absences.

So if a period is unclear, things like your addresses, travel history, housing, family ties and tax records can all become relevant.

The big takeaway is: don’t assume that because CRA considered you a Canadian tax resident, every year you spent living abroad will automatically count toward OAS.

If you’re planning a move and your residence history has any gaps or uncertainties, that’s exactly the kind of situation we help untangle through cross-border exit planning.

You can book a free discovery call to discuss your situation and understand what needs to be addressed before you leave Canada.

For more practical guidance on leaving Canada, tax residency, and planning your finances across borders, explore our financial planning services or join our free financial newsletter.